top of page

The Basics - Cold Pressed & Hot Pressed

Updated: Apr 30

Welcome to Copacker Search Wisdom


Cold-pressed and hot-pressed are are both very good methods of extracting oils but have unique processes and benefits. Cold pressing is a highly effective method of extracting oils from seeds, nuts, or fruits using mechanical pressure without the use of external heat. This process is widely favored for certain types of oils, such as olive oil, coconut oil, avocado oil, and certain seed oils, like flaxseed oil, hempseed oil, and pumpkin seed oil. Cold pressing is believed to better preserve the oil's flavor, aroma, and nutritional quality than hot pressing methods, which can degrade sensitive compounds, such as antioxidants and fatty acids. Additionally, cold-pressed oils are considered more natural and minimally processed, making them a highly appealing option for consumers looking for healthier options. However, it's worth noting that cold-pressed oils may have a shorter shelf life and be more expensive than their conventionally processed counterparts.


On the other hand, hot pressing is a highly efficient method of extracting oil from seeds, nuts, or fruits by applying heat and pressure to the raw material. This process is commonly used in the food industry and is preferred for its efficiency, faster processing, improved oil quality, and cost-effectiveness. However, the application of heat during hot pressing can lead to the degradation of heat-sensitive compounds in the oil, such as antioxidants and vitamins. Therefore, the choice between hot pressing and cold pressing depends on various factors, including the desired quality of the oil and the specific requirements of the production process. Let's take a methodical look at both, starting with Cold Pressing.


Cold pressing in food processing refers to the extraction of oils from seeds, nuts, or fruits using mechanical pressure without the use of external heat. This method is often employed to preserve the natural flavors, colors, and nutritional qualities of the oil.


Here's how the process typically works:

1. Preparation: The seeds, nuts, or fruits are cleaned and prepared for pressing. This may involve shelling, hulling, or grinding, depending on the type of raw material.

2. Pressing: The prepared material is placed into a hydraulic press or screw press, where pressure is applied to squeeze out the oil. Unlike traditional methods that use heat to extract oil, cold pressing relies solely on mechanical pressure. The pressure ruptures the oil-containing cells in the raw material, releasing the oil.

3. Separation: The extracted oil is separated from the solid residue (often called cake or meal) using filtration methods. The resulting oil is then typically filtered to remove any remaining solids.

Cold pressing is favored for certain types of oils, particularly those that are sensitive to heat and oxidation. Some common oils that are often cold-pressed include:

- Olive oil

- Coconut oil

- Avocado oil

- Certain seed oils like flaxseed oil, hempseed oil, and pumpkin seed oil


Cold pressing is believed to better preserve the flavor, aroma, and nutritional quality of the oil compared to hot pressing methods, as heat can degrade sensitive compounds such as antioxidants and fatty acids. Additionally, cold-pressed oils are often considered more natural and minimally processed, which can be appealing to consumers looking for healthier options. However, it's worth noting that cold-pressed oils may have a shorter shelf life and be more expensive than their conventionally processed counterparts.


So what is Hot pressed? In food manufacturing, "hot pressing" typically refers to a process used in the production of certain food products, particularly in the context of oil extraction from seeds, nuts, or fruits. Hot pressing involves applying heat and pressure to the raw material to extract oil from it.


Here's how the process generally works:

1. Preparation: The seeds, nuts, or fruits are cleaned and prepared for pressing. This may involve removing any husks, shells, or other unwanted materials.

2. Heating: The prepared material is heated to a temperature above its softening point but below its decomposition point. The specific temperature required depends on the type of raw material being processed.

3. Pressing: The heated material is then placed into a mechanical press, where pressure is applied to squeeze out the oil. The pressure helps to rupture the oil-containing cells in the raw material, facilitating the extraction process.

4. Separation: The extracted oil is separated from the solid residue (often called cake or meal) using filtration methods. The resulting oil is then typically filtered to remove any remaining solids or impurities.


Hot pressing is commonly used for oil extraction in the food industry for several reasons:

- Efficiency: Heating the raw material helps to reduce its viscosity and makes it easier to extract oil. This can result in higher oil yields compared to cold pressing methods.

- Faster processing: Hot pressing typically requires less time than cold pressing methods, making it more efficient for large-scale production.

- Improved oil quality: Heating the raw material can help to reduce the moisture content and microbial load, leading to better oil quality and longer shelf life.

- Cost-effectiveness: Hot pressing is often more cost-effective than cold pressing methods, especially for certain types of oilseeds.


However, it's worth noting that the application of heat during hot pressing can also lead to some degradation of heat-sensitive compounds in the oil, such as antioxidants and certain vitamins. Therefore, the choice between hot pressing and cold pressing depends on various factors, including the desired quality of the oil and the specific requirements of the production process.


Both hot and cold pressing have great benefits, but one may beat out the other for your unique project or ingredient needs. Explore both and be sure to ask questions of your manufacturing rep or ingredient vendor rep. They should be more than happy to answer or find one for you!


As always, Happy Hunting!


The CVL Team

1 view

Comments


bottom of page